Transform an object in a trapezoidal way

[raulM]

Hey all,

The last days, I was trying to find my way into scripting to automatize some workflows.

I don’t really know where to start on this specific project, so I finally take a shortcut and try to find some answers from more experienced people. 😉

Basically I’m trying to change the width of an object/group.

The width should be changed in two different values — one width-change on the top, another one on the bottom. The values are calculated by: width*cos(y). Where Y is the Y-Value of the maximum or minimum. All points between the maximum and minimum should be changed in a linear way. Similar to a trapezoid.

A bit like it can be done manually with the free-transform-tool:

(The shapes are representing the transformation, not the actual paths!)

I’m not sure, if that’s even possible. Maybe someone could give me a hint where to start or share some experiences.

Merci beaucoup and have a great Day!

Raul

(Sorry, I’m totally struggling to describe this in english... )

[pixxxelschubser]

Sorry, but your image is not visible.

It's not clear for me what you really want.

But perhaps this old snippet by CarlosCanto will point you to the right direction

// skew or shear selection, carlos canto 07/04/13
// http://forums.adobe.com/message/5477878#5477878
var idoc = app.activeDocument;
var sel = idoc.selection[0];
var im = app.getIdentityMatrix();
//im.mValueB = .5; // skew y 50%
im.mValueC = .5; // skew x 50%
 nsform (im, true, true, true, true, 1, undefined);

Have fun

[Silly-V]

That's supposed to be 'transform'?

[pixxxelschubser]

Oops. Is there a black hole in the near?

the last line should be:

sel.transform (im, true, true, true, true, 1, undefined);